KR20230161184A - A chest catheter for insertion into the pleural cavity - Google Patents

Abstract

The present invention relates to a catheter for thoracic insertion. More specifically, the catheter for thoracic insertion is equipped with: a hollow tube (100) inserted into the thoracic cavity through an incision formed on the skin of a patient; a plurality of penetration holes (102) formed at one end of the hollow tube (100) inserted into the thoracic cavity of the patient; a line (104) formed with a constant width in the longitudinal direction on the outer circumference of the hollow tube (100); and a graduation mark (106) provided on one side of the line (104) so as to enable checking the insertion depth of the hollow tube (100) inserted into the thoracic cavity of the patient. The catheter for thoracic insertion comprises: a catch groove (110) formed in the circumferential direction by being concave at a constant depth in the radial direction on the outer circumference of the hollow tube spaced apart from one end of the hollow tube (100) by a constant length; a pair of adhesive bands (120, 121) mutually attached or fixed to both sides of an incision part (C) of the patient's body into which the hollow tube (100) is inserted to face each other; a pull-line fixing member (123, 124) provided on each side of the pair of adhesive bands (120, 121) facing each other; and a pair of pull-lines (130, 131), wherein while each end thereof is simultaneously hooked to the pull-line fixing member (123, 124) of the adhesive bands (120, 121) in a zigzag shape, the other end thereof is fixed to the catch groove (110) so that when the hollow tube (100) is pulled out from the patient's body, the adhesive bands (120, 121) that are attached apart from each other are pulled toward the incision part (C), thereby sealing the skin around the incision part (C). The present invention relates to a catheter for thoracic insertion, which is configured to naturally seal during the process of removing a catheter inserted into the patient's thoracic cavity, thereby preventing external air from flowing into the thoracic cavity during the process of removing the thoracic catheter.

Description

A chest catheter for insertion into the pleural cavity}

The present invention relates to a catheter for insertion into the thoracic cavity, and more specifically, in the process of removing a catheter inserted into the patient's thoracic cavity, the adhesive band attached around the incision in the patient's body through which the catheter penetrates is pulled toward the incision, thereby inserting the catheter. It relates to a catheter for insertion into the thoracic cavity that is configured to block external air from entering the thoracic cavity during the process of withdrawing the thoracic catheter while naturally sealing the incision site during final withdrawal.

Generally, when a patient's physical function declines or the function of a specific organ within the body deteriorates, a tube (catheter) with a certain diameter is inserted into the body and unnecessary elements inside the body are discharged out of the body or drugs are administered into the body. A procedure is performed to inject .

These catheters are manufactured and used in various diameters so that sizes with different diameters can be used depending on the patient's body location and disease type.

The present invention relates to various types of catheters, especially thoracic catheters used in the thoracic cavity, and the description of the present invention is limited to this.

To treat diseases occurring in the lungs, a procedure is performed in which a circular tube (chest tube, hereinafter referred to as a 'thoracic catheter') is passed between the ribs and inserted into the pleural cavity. .

This thoracic catheter procedure is performed for the purpose of excreting pneumothorax, hemothorax, empyema, and exudate from the patient's lungs out of the body or injecting drugs necessary to treat the disease.

One embodiment of a conventionally used catheter is shown in Figure 1, and the structure of a conventional thoracic catheter will be briefly described below with reference to Figure 1.

That is, the conventionally commonly used catheter 50 has one end inserted into the patient's body for a certain length, the other end is made of a predetermined length so that it can be connected to a drain device, and is made of soft resin or silicone to have certain rigidity and transparency. , It is composed of materials using medical tubes such as elastomers and various other synthetic materials.

In addition, this thoracic catheter 50 has a plurality at one end so that it can serve as a passage to remove air or pus filled in the pleura after being inserted into the pleural cavity, or to discharge blood filled in the pleural cavity due to damage to the lungs. Two openings 10 are formed.

In addition, a line 20 having a certain thickness is formed in the longitudinal direction on the outer periphery of the thoracic catheter 50, and on the line 20, there is a scale 30 that allows the depth of insertion into the patient's body to be confirmed. It has this formed structure.

In order to insert the thoracic catheter 50 configured as described above into the patient's body, the subcutaneous tissue and muscles of the body are peeled off to a certain size using a predetermined surgical tool, the pleura is pierced to secure a penetration passage, and then a predetermined amount is inserted into the thoracic cavity. A thoracic catheter is inserted and positioned using tools.

After intubating the catheter into the patient's body, the catheter is fixed to the patient's skin with sutures, and when withdrawing the catheter out of the body after treatment, great care is taken to prevent air from entering between the incised skin where the catheter was inserted. It is necessary to remove it while doing .

However, in the process of removing the catheter, depending on the skill of the doctor or nurse, air often enters the chest cavity, and the process of inserting the catheter into the chest cavity again to remove air is often repeated, increasing the patient's pain. In addition, the risk of complications due to catheter intubation increased, so careful attention was needed to remove the catheter.

In other words, after the catheter is removed, a sterile gauze is applied and a compression dressing is applied to prevent pleural fluid leaking or air inflow at the site where the catheter was removed (puncture site), and the patient is placed on a pressure dressing to prevent pressure from being applied to the puncture site for a certain period of time. It was possible to prevent the puncture site from opening by changing its position, suturing the puncture site, or attaching an adhesive band.

- Korean Patent Publication No. 10-2018-0004905 (2018.01.15) - Korean Patent No. 10-1864315 (2018.05.29) - Korea Geuk Registered Patent No. 10-1615448 (2016.04.19)

The present invention was developed to solve the problems that occurred during the conventional thoracic catheter procedure. When the thoracic catheter is removed from the patient's body, the adhesive band attached around the incision is pulled toward the skin incision through which the catheter is removed, thereby naturally opening the incision. The purpose is to provide an improved catheter for insertion into the thoracic cavity that can be tightly adhered to block external air from entering the thoracic cavity through the incision during the catheter withdrawal process.

In order to achieve the above-mentioned object, the catheter for insertion into the thoracic cavity according to an embodiment of the present invention includes a hollow tube inserted into the thoracic cavity through an incision formed in the patient's skin, and the hollow tube inserted into the thoracic cavity of the patient. A plurality of through holes formed at one end, a line formed at a certain width in the longitudinal direction on the outer periphery of the hollow tube, and a scale display on one side of the line to check the insertion depth of the hollow tube inserted into the patient's chest cavity. It is provided with a locking groove formed in the circumferential direction by digging a certain depth in the radial direction on the outer periphery of the hollow tube spaced at a certain length from one end of the hollow tube, and both sides of the incision in the patient's body into which the hollow tube is inserted. A pair of adhesive bands that are attached or fixed to face each other, a pull cord fixture provided on each side of the pair of adhesive bands in the direction facing each other, and one end of each of the pull cord fixtures of the adhesive bands on both sides in a zigzag shape. In this simultaneous draped state, the other end is fixed to the locking groove, and when the hollow tube is pulled out from the patient's body, the adhesive bands attached at a distance from each other are pulled toward the incision, and the skin around the incision is a pair of pieces that seal the incision. It consists of a configuration including a pull cord.

In particular, when the hollow tube and the pull cord are pulled, the pull cord held by the pull cord fixtures of the adhesive bands on both sides is pulled vertically while positioned in the center of the adhesive bands on both sides. It consists of a configuration further provided.

In addition, the hanging groove is further provided with a pull cord length adjuster capable of fixing the pull cord and adjusting the length of the pull cord in accordance with the hollow tube, and the pull cord length adjuster is a fixed coupling formed in a cylindrical shape with a hollow portion formed in the center. A piece, a fitting piece having a screw coupling portion at a certain height in the center of the upper surface so as to be screwed to the inner peripheral surface of the fastening piece, and a pair of pull cords formed through the piece upward and downward on both sides of the piece to secure the piece. A pair of pull cord insertion holes configured to pressurize and secure the pull cord drawn out to the upper surface by the coupling force of the coupling piece, and when the pulling force of the pull cord acts when the hollow tube is pulled out, the pull cord is inserted into the outer periphery of the hollow tube. The fixing piece is configured to be provided with a locking protrusion protruding in the circumferential direction on the inner circumferential surface of the fixing piece so that the fixing piece is firmly fixed to the outer periphery of the hollow tube.

The catheter for insertion into the thoracic cavity according to the embodiment of the present invention, which has the above-described configuration, removes the hollow tube from the patient's body, and at the same time, the hollow tube is pulled out from the incision, and the incision in the skin that opens as the hollow tube is pulled out is pulled. The adhesive bands attached to both sides of the incision are pulled toward the incision by the pulling force of the string, naturally sealing the incision. This effectively blocks external air from entering the patient's chest cavity through the incision during the withdrawal of the hollow tube, helping the medical staff. It not only makes treatment easier but also relieves the patient's pain.

That is, in the catheter for insertion into the thoracic cavity according to an embodiment of the present invention, during the withdrawal process, the adhesive bands attached to both sides of the incision are pulled by the pulling force of the pull cord along with the withdrawal of the hollow tube, effectively sealing the skin incision. This reduces the risk of external air entering the thoracic cavity and causing various complications, and reduces the process of repeatedly inserting the hollow tube back into the thoracic cavity due to air entering when the hollow tube is withdrawn, thereby reducing the risk that the patient may experience. Helps reduce pain.

1 is a perspective view of the exterior of a catheter for insertion into the thoracic cavity according to a conventional embodiment;
Figure 2 is an external perspective view of a catheter for insertion into the thoracic cavity according to an embodiment of the present invention;
Figure 3 is a state diagram of the main part of the catheter for insertion into the thoracic cavity according to an embodiment of the present invention,
Figures 4 to 7 are an external perspective view, a separated state diagram, a vertical cut sectional view of one side, and a state in which the pull cord is combined, according to an embodiment of the pull cord length adjuster fitted and fixed to the outer periphery of the hollow tube in an embodiment of the present invention. cross section of,
Figures 8 to 10 show a state in which a catheter for thoracic insertion according to an embodiment of the present invention is administered to a patient, and a state in which both adhesive bands are pulled when the pull cord is pulled, respectively.

The catheter for insertion into the thoracic cavity (hereinafter abbreviated as 'catheter') according to an embodiment of the present invention is a pull connected to the hollow tube when the hollow tube inserted into the patient's body for the treatment of the patient's disease is taken out of the body after treatment. As the string is pulled, the adhesive band attached around the incision where the hollow tube exits is pulled toward the incision and adheres to the incised skin, effectively blocking external air from entering the chest cavity.

To this end, the catheter according to an embodiment of the present invention includes a hollow tube inserted into the chest cavity through an incision formed in the patient's skin, a plurality of through holes formed at one end of the hollow tube inserted into the patient's chest cavity, and It consists of a line formed at a certain width in the longitudinal direction on the outer periphery of the hollow tube, and a scale indicator provided on one side of the line to check the insertion depth of the hollow tube inserted into the patient's chest cavity.

In addition, a locking groove is formed in the circumferential direction by digging a certain depth in the radial direction at the outer periphery of the hollow tube, which is spaced a certain length apart from one end of the hollow tube, on both sides of the incision in the patient's body into which the hollow tube is inserted. A pair of adhesive bands that are attached or fixed to face each other are provided, and a pull-string fixture on which a pull-string is draped or inserted is provided at one end of each pair of adhesive bands in a direction facing each other.

In addition, while each end is draped simultaneously in a zigzag shape on the pull cord fixture of both adhesive bands, the other end is fixed to the locking groove so that when the hollow tube is pulled to remove it from the patient's body, it is spaced a certain distance away from each other around the incision area. It consists of a pair of pull cords that allow the skin around the incision to seal the incision while a pair of attached adhesive bands are pulled toward the incision.

In particular, when the hollow tube and the pull cord are pulled, the pull cord that is inserted into or draped over the pull cord fixture of the adhesive bands on both sides is positioned in the center of the adhesive bands on both sides and is pulled vertically, so that the pair of pull cords is provided with a pull cord clamping device. It consists of a further inserted configuration.

In addition, the locking groove is further provided with a pull cord length adjuster capable of fixing the pull cord and adjusting its length to fit the hollow tube.

Hereinafter, preferred embodiments of catheters according to embodiments of the present invention will be described in detail with reference to the drawings attached to the specification.

Figure 2 shows the overall configuration of the catheter according to an embodiment of the present invention, and Figure 3 shows the main part of the catheter in a separated state according to an embodiment of the present invention.

As shown in Figures 2 and 3, the catheter 200 according to an embodiment of the present invention is one end inserted into the patient's body to excrete pneumothorax, hemothorax, empyema, exudate, etc. occurring inside the thoracic cavity to the outside of the body. A hollow tube 100 of a certain length, a pair of adhesive bands 120 and 121 attached around an incision formed to insert the hollow tube 100 into the patient's body, and the hollow tube 100 ) between the pull string length adjuster (150) fitted into the catching groove formed on the outer periphery of the pull string length adjuster (150) and the pull string fixtures (123, 124) provided at each end of the adhesive bands (120, 121) and the pull string length adjuster (150) A pair of pull lines (130, 131) are connected to and pull the skin to which the adhesive bands (120, 121) and the adhesive band on both sides are attached toward the incision when the hollow tube (100) is pulled out from the patient's body.

In addition, in the process of pulling the pair of pull cords 130 and 131, the pull cords 130 and 131, each end of which is connected to the adhesive bands 120 and 121 on both sides, are pulled close to each other. It consists of a string collection device (140).

To explain this in more detail, the hollow tube 100 has a soft tube shape, and when inserted into the patient's body, there is a plurality of tubes at one end to allow air, hemothorax, empyema, exudate, etc. filled in the chest cavity to flow into the inside. Two through holes 102 are formed, and a line 104 of a certain thickness is formed in the longitudinal direction on one side of the outer periphery of the hollow tube. A scale display portion 106 is formed, and this configuration is the same as the conventional embodiment.

However, a feature that is different from the conventional one is that a locking groove 110 of a certain depth is formed in the circumferential direction from the outer periphery of the hollow tube 100, and a pull cord length adjusting device 150 is provided in the catching groove 110. The point is that the pull cords 130 and 131, which are connected to the adhesive bands 120 and 121 attached to both sides of the patient's incision, are connected to the pull cord length adjusting device 150.

That is, as shown in FIGS. 4 to 6, the pull cord length adjuster 150 has a hollow portion 151 formed so that the central part penetrates up and down and can be inserted into the outer periphery of the hollow tube 100. It is composed of a fixed coupling piece 152 and a fitting fixture 153 that have a structure that is separated and coupled at the top and bottom.

As shown in the separation state diagram of FIG. 5, the fixed coupling piece 152 and the fitting fixture 153 have a structure that can be easily coupled and separated from each other, and secure the pull cord in the coupled state, and in the released state, It is configured so that the pull cord can be pulled out and its length can be adjusted.

In the case of one embodiment shown in the drawing, a screw engaging portion 155 having a male thread formed on the outer periphery with a certain diameter is formed on the lower fitting fixture 153, and a female threaded portion formed on the inner periphery of the upper fixing coupling piece 152. (not shown) is structured to be coupled to the screw coupling portion 155.

And, as shown in Figures 6 and 7, a pull cord penetrating upward and downward is inserted into the left and right sides of the upper surface of the fitting fixture 153, which is in contact with the bottom surface of the fixed coupling piece 152 coupled to the screw engaging portion 155. A hole 154 is formed on the bottom side of the fitting fixture 153, and a pair of pull cords are inserted into the pull cord fitting hole 154 and then pulled out to the upper surface of the fitting fixture 153. (152) is configured to press and secure the pull cord while being coupled to the screw coupling portion (155).

Of course, if it is necessary to adjust the length of the pull cord according to the length of the hollow tube 100 and the depth at which the hollow tube 100 is inserted into the patient's body, the fixing coupling piece 152 is loosened and the pull cord is compressed. After the state is released, the pull cord is pulled to the upper or lower surface of the fitting fixture 153 to allow appropriate length adjustment.

The pull lines (130, 131) are connected to an adhesive band attached around the incision formed on the patient's skin when the hollow tube 100 is pulled out from the patient's body, and are rigid enough to allow the adhesive band to be pulled toward the center of the incision. Any material that has is sufficient.

In addition, the length of the pull cords (130, 131) connected between the pull cord length adjuster (150) and the adhesive band attached to the patient's body is adjusted to the length of the pull cord (130, 131) connected to the patient's skin during the process of removing the hollow tube (100) from the patient's body. It is preferable that the adhesive bands attached to both sides of the cut incision are connected to a length that can provide a constant pulling force so that they can adhere closely to each other.

That is, the length from the position where the pull cord length adjuster 150 is coupled to the tip of the catheter inserted into the patient's chest cavity is L, and the adhesive attached to both sides of the incision from the pull cord length adjuster 150 When the length of the pull cord connected to the pull cord fixture (123, 124) of the band is ℓ, ℓ = L + α (α = gap between both adhesive bands) is maintained so that it remains constant even after the catheter is finally withdrawn from the patient's body. It is more preferable to be configured to be pulled by the length α.

And, in Figure 8, the catheter 200 of the embodiment of the present invention is shown in an installed state in the chest area of the patient, and in Figures 9 and 10, the adhesive bands 120 and 121 attached to the patient's body are hollow tubes ( It briefly shows a state in which the pull cords 130 and 131 are pulled according to the withdrawal of 100) and the incision portion C is contracted (closed).

As shown in Figures 8 to 10, the catheter 200 according to an embodiment of the present invention is an adhesive that is attached around the incision C where the hollow tube 100 is cut to be inserted into the patient's chest cavity. In the process of withdrawing the hollow tube 100 connected to the bands 120 and 121 out of the body, the hollow tube 100 is cut while pressing the pull cord focus port 140 inserted into the pair of pull cords 130 and 131 with one hand. It is taken out from part (C).

As the pull strings 130 and 131 connected to the hollow tube 100 are pulled, the adhesive bands 120 and 121 on both sides of the cut portion C are forcibly pulled by the pull strings 130 and 131, and are bonded as shown in Figure 10. The patient's skin (S) attached to the bands (120, 121) is also pulled toward the incision (C), and the incision (C), which opens when the hollow tube (100) is withdrawn, naturally adheres to it, preventing external air from flowing into the chest cavity. Enables effective blocking.

Typically, during the insertion procedure of the catheter 200 into the hollow tube 100, adhesive bands 120 and 121 are attached around the incision C of the patient's skin to secure the hollow tube 100 taken out of the body. However, the adhesive bands (120, 121) applied to the embodiment of the present invention are equipped with a pull-string fixture (123, 124) at one end for inserting a pull-string (130, 131), and the pull-string fixture (123, 124) has a pull-string (130, 131) attached to the pull-string fixture (123, 124). A hook that can be caught or a through hole that can be inserted is provided.

The adhesive bands (120, 121) according to an embodiment shown in the drawing are provided with pull-string fixtures (123, 124) having a certain height in the vertical direction at one end provided with an adhesive layer that adheres to the skin, and the left and right adhesive bands (120, 121) A plurality of pull rope hanging holes 125 are formed through the pull rope fixtures 123 and 124 provided in .

Therefore, after a pair of pull cords (130, 131) are simultaneously inserted into the left and right pull rope hangers (125) in a zigzag form, they are drawn upward from the midpoint of the pull cord fixtures (123, 124) and pass through the pull cord catcher (140). It is fixed to the pull cord length adjuster 150 fixed to the hollow tube 100 described above.

That is, by alternating the pull wire hanger holes 125 provided in the left and right pull wire fixtures 123 and 124 of the adhesive bands 120 and 121, one pull cord 130 is moved from the outer end to the inside of the pull cord fixtures 123 and 124. After continuously inserting it in a zigzag form, it is pulled upward from the center of the pull cord fixture (123).

In addition, another pull cord 131 is continuously inserted in a zigzag shape from the outside to the inside of the other end of the pull cord fixtures 123 and 124, and is then drawn upward from the center of the pull cord fixture 123.

After being pulled upward from the center of the pull cord fixtures 123 and 124, a pair of pull cords 130 and 131 are passed through the through hole 142 of the pull cord fastener 140 and then inserted and fixed into the hollow tube 100. It is fixed to the pull cord length adjuster (150).

When fitting and fixing the pull cord length adjuster, the upper fixing connecting piece 152 is separated from the lower fitting fixing piece 153, and then is connected to the pull cord fitting hole 154 formed in the fitting fixing piece 153 from the bottom to the top. After inserting it, adjust it to an appropriate length according to the length of the hollow tube, and then connect the separated fixing piece (152) to the insertion fixing piece (153) to fix the pull cord.

Meanwhile, when withdrawing the hollow tube 100, the medical staff pulls the hollow tube 100 in the vertical direction while holding the pull cord focusing port 140 with one hand (H), along with the pull cord. When pulled in the vertical direction and pressed downward, the pull cord located at the bottom of the pull cord catcher 140 induces the left and right pull cord fixtures 123 and 124 to be pulled in the horizontal direction, thereby attaching the adhesive bands 120 and 121 and the incision (C). ) As the surrounding skin (S) is pulled toward the incision (C), the incision (C) naturally comes into close contact with each other at the same time as the hollow tube (10) is pulled out.

After the hollow tube 100 is completely taken out of the body, the pull strings 130 and 131 connected to the hollow tube 100 are separated and held in a tied state on the upper surface of the pull cord focus port 140, and then the incision is made. After it is completely adhered, simply remove the adhesive band.

In addition, the adhesive bands 120 and 121 applied to the present invention are provided with an adhesive layer on the back side to firmly adhere to the patient's skin. The configuration of such adhesive bands is known in the prior art, so the detailed description of the present invention will cover this. Detailed explanations are omitted.

In addition, the pull cord fixtures 123 and 124 formed in a vertical direction at one end where the adhesive layer is provided are formed to be somewhat thicker than the area where the adhesive layer is formed, and are configured to have rigidity that does not easily separate when the pull cord inserted into the pull rope hanger hole is pulled. desirable.

Above, a preferred embodiment of the catheter according to an embodiment of the present invention has been described with reference to the attached drawings, but those skilled in the art may simply design and modify some of the configurations shown in the detailed description and drawings of the present invention into various forms. will be possible.

10,102: Through hole 20,104: Line
30,106: Scale display 40,100: Hollow tube
50,200: Thoracic catheter 110: Locking groove
120,121: Adhesive band 123,124: Pull rope fixture
125: Pull rope hanger 130,131: Pull rope
140: Pull wire catch 142: Through hole
150: Pull cord length adjuster 151: Hollow part
152: fixed coupling piece 153: fitting fixed piece
154: Pull line insertion hole 155: Screw joint
156: Locking jaw 200: Thoracic catheter
H: Hand C: Incision
S: skin

Claims (3)

A hollow tube 100 inserted into the chest cavity through an incision formed in the patient's skin, a plurality of through holes 102 formed at one end of the hollow tube 100 inserted into the patient's chest cavity, and the hollow A line 104 is formed at a certain width in the longitudinal direction on the outer periphery of the tube 100, and on one side of the line 104 to check the insertion depth of the hollow tube 100 inserted into the patient's chest cavity. A scale display unit 106 is provided,
A locking groove 110 formed in the circumferential direction by being dug at a certain depth in the radial direction at the outer periphery of the hollow tube spaced a certain length from one end of the hollow tube 100, and
A pair of adhesive bands (120, 121) attached or fixed to each other opposite to each other on both sides of the incision (C) of the patient's body where the hollow tube (100) is inserted,
Pull rope fixtures (123, 124) provided on one side of the pair of adhesive bands (120, 121) facing each other,
With each end simultaneously draped over the pull cord fixtures 123 and 124 of the adhesive bands 120 and 121 on both sides in a zigzag shape, the other end is fixed to the locking groove 110 so that the hollow tube 100 is spaced apart from the patient's body. The attached adhesive bands (120, 121) are pulled toward the incision (C) and a pair of pull cords (130, 131) that allow the skin around the incision to seal the incision (C). Catheter for insertion into the chest cavity. According to paragraph 1,
When the hollow tube 100 and the pull cords 130 and 131 are pulled, the pull cords 130 and 131 stretched over the pull cord fixtures 123 and 124 of the adhesive bands 120 and 121 on both sides are positioned in the central portion of the adhesive bands 120 and 121 on both sides. A catheter for insertion into the thoracic cavity, characterized in that the pair of pull cords (130, 131) is further provided with a pull cord focus port (142) so as to be pulled vertically. According to claim 1 or 2,
The hanging groove 110 is further provided with a pull cord length adjuster 150 capable of fixing the pull cords 130 and 131 and adjusting the length of the pull cords 130 and 131 in accordance with the hollow tube 100,
The pull cord length adjuster 150 includes a fixed coupling piece 152 having a cylindrical shape with a hollow portion 151 formed in the center,
A fitting fixing piece 153 provided with a screw engaging portion 155 at a certain height at the center of the upper surface so as to be screwed to the inner peripheral surface of the fixing connecting piece 152,
A pair of pull cords (130, 131) are formed to penetrate upward and downward on both sides of the inserting fixing piece (153), and then the pulling cord (130, 131) drawn out to the upper surface is pressurized and fixed by the coupling force of the fixing coupling piece (152). A pair of pull cord insertion holes (154),
When the pulling force of the pull cord is applied when the hollow tube is pulled out, the inserting fixing piece 153 is attached to the outer periphery of the hollow tube so that it is firmly fixed to the outer periphery of the hollow tube. A catheter for insertion into the thoracic cavity, characterized in that it is provided with a locking protrusion (156) protruding in the circumferential direction on the inner peripheral surface of the.